If you're seeking a browser to resolve Handshake (HNS) domains, consider Carbon or Aloha.
In the past, a Chromium-based browser called Beacon supported ICANN, HNS, and ENS resolution, but it has been deprecated.
https://github.com/imperviousinc/beacon
An ideal solution would be browser integration with SANE (Stateless DANE) for secure Web3 browsing.
https://github.com/randomlogin/sane
ICANN, HNS, and ENS are compatible, and I believe SNS is as well. The .onion TLD was reserved for Tor on HNS but is locked after the claim period ended, pending a potential hard fork.
Source: https://shakeshift.com/name/onion
Unstoppable Domains is not compatible with HNS or ICANN, as it frequently creates new TLDs out of thin air . Its more a NFT than a domain.